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KNOW IT ALL: Monday's Top Stories at NBC News

The storm, the Super Bowl and the race for the White House.
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Good morning, and happy Monday. Here are some of the headlines we're following this morning:

The Big Dig (Out): East Coast Emerges from Monster Snowstorm

The East Coast continues to dig out from a mammoth snowstorm that buried snowfall records, grounded more than 13,000 flights and was blamed for 30 deaths. Find the latest conditions in NEWS.

Slain Good Samaritan Was a Single Dad

A man who was shot to death in North Carolina on Friday after trying to help a stranded driver was a single father caring for his 17-month-old son, Brentlee. Read more in NEWS.

How Geography Favors Hillary Clinton In Iowa

With the critical Iowa caucuses just a week away and polls showing Democratic presidential candidates Bernie Sanders and Hillary Clinton neck-and-neck, geography may play a bigger role than turnout in favoring Clinton. Read more at DECISION 2016.

Top Twitter Executives to Leave Company in Reshuffle

Four senior Twitter executives are leaving the company, outlining the biggest leadership changes since Jack Dorsey returned as CEO calling for "bold rethinking". Read more in TECH.

California Wildfire Victims Still Picking Up the Pieces

More than four months have passed since the devastating Valley Fire tore through Lake County, California, yet the cleanup is not over and rebuilding likely will not begin until spring. Read more in NEWS.

Want to Go to the Super Bowl? That'll Cost You

The Carolina Panthers and the Denver Broncos have booked places at Super Bowl 50 on Feb. 7 in Santa Clara, California. If you're intending to join them, it's a pricey proposition. Read more in CONSUMER.

20 Latin American Countries Now Have Zika

The Zika virus has now spread to 20 countries in Latin America and the Caribbean, including some popular tourist destinations, and it's likely to spread farther, international health officials said. Read more in HEALTH.

Astronauts Witness Rare 'Thundersnow' From Space

You can't hear thunder in space but that didn't dampen Scott Kelly's excitement at witnessing the massive storm hovering over the East Coast of the United States from his perch on the International Space Station. See the images in NEWS.

A massive snowstorm churns over the East Coast of the United States on Jan. 23.
A massive snowstorm churns over the East Coast of the United States on Jan. 23.Scott Kelly / NASA